## General Mechanical

Topics relate to Mechanical Enterprise, Motion, Additive Print and more

#### Harmonic Acoustic

Subscriber

I need define Rockwool material as an absorber in Harmonic Acoustic Analysis.

How can i define in boundry condition?

And what type of region gor that?

Pls Help me asap...

Ansys Employee

Hi Paras,

You will need to define the material "Rockwool" in Material properties and then assign it to the appropriate geometry of insulation.

To check how to define a material in the "Engineering Data" tab (as shown in the figure below), you can take a look at the following Ansys Help Link: 6.4. Material Properties (ansys.com)

Regards,

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• Erik Kostson
Ansys Employee

Hi

To add, we need to use perforated material properties (e.g., DB, JCA or Miki material models) for the rockwool which is modelled.

The perforated materials are under engineering data. The material is then assigned as normal/usual to the corresponding body in Mechanical.

For a tutorial on using these see:

https://forum.ansys.com/forums/topic/acoustic-analysis-materials-problem/

All the best

Erik

Subscriber

Hello,

What is require boundary condition for sound absorber material (Rockwool) In harmonic acoustic analysis.

• Erik Kostson
Ansys Employee

Hi

There is no boundary condition to model Rockwool, what you need to do as we said and I hope it is clear, is to define the material “Rockwool” in Material properties and then assign it to the appropriate geometry/body representing the Rockwool.

To check how to define a material in the “Engineering Data” tab (as shown in the figure below), you can take a look at the following Ansys Help Link: 6.4. Material Properties (ansys.com)

To add, we need to use perforated material properties (e.g., DB, JCA or Miki material models) for the rockwool which is modelled.

The perforated materials are under engineering data. The material is then assigned as normal/usual to the corresponding body in Mechanical.

For a tutorial on using these see:

https://forum.ansys.com/forums/topic/acoustic-analysis-materials-problem/

All the best

Regards,